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<H1>Introduction</H1>
<P>This reference manual is for people with a knowledge of basic
computer programming. The manual provides the information needed
to access VT220 features. The manual is organized into the
following chapters and appendices.</P>
<P><A HREF="chapter1.html">Chapter 1, "Terminal Overview"</A>, introduces you to the terminal.
The chapter briefly discusses the terminal's capabilities and
operating modes.</P>
<P><A HREF="chapter2.html">Chapter 2, "Character Encoding"</A>, describes the character encoding
schemes used for the terminal. The chapter also describes the
terminal's character sets and provides an overview of the control
function format.</P>
<P><A HREF="chapter3.html">Chapter 3, "Transmitted Codes"</A>, describes the codes that the
terminal sends to a program.</P>
<P><A HREF="chapter4.html">Chapter 4, "Received Codes"</A>, describes the codes that the terminal
recognizes and responds to.</P>
<P><A HREF="appendixa.html">Appendix A, "VT220/VT102 Differences"</A>, describes the major
differences between a VT102 terminal and the VT220 terminal
operating in a VT100 mode.</P>
<P><A HREF="appendixb.html">Appendix B, "Additional VT220 Documents"</A>, describes other VT220
documents you can order from Digital.</P>
<P>Appendix C, "Using Control Codes", provides general suggestions on
how to use VT220 control codes in any software application.</P>
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